Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1994-10-27
1996-06-11
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, 60286, 60298, 60301, F01N 318, F01N 336
Patent
active
055244327
ABSTRACT:
Nitrogen oxides are removed from the exhaust of an internal combustion engine which operates on a methane-containing fuel by reacting the nitrogen oxides and oxygen in the exhaust gas with a controlled amount of methane in the presence of a reducing catalyst. The catalyst preferably comprises a crystalline zeolite having a silicon to aluminum ratio of equal to or greater than about 2.5 which is prepared from a non-acid zeolite which is ion exchanged with a cation selected from the group consisting of cobalt, nickel, iron, chromium, and manganese. Methane for the reaction is provided as a portion of the methane-containing fuel. Carbon monoxide present in the exhaust gas is converted to carbon dioxide simultaneously with the reduction of nitrogen oxides.
REFERENCES:
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Air Products and Chemicals Inc.
Fernbacher John M.
Hart Douglas
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